The amount of resistance to this idea lets me know it’s probably an idea worth exploring.
nostr:nevent1qqsyvt9554tzzl8euv7plcmwsrv6k5ud4hsvg4d6chwjhs476gs2rxcpz3mhxue69uhhyetvv9ujuerpd46hxtnfduzns2...
Couldn't you do that with a relay? Set it up to reject all interactions from anyone who hasn't zapped you? Then you could turn any client into a quiet space.